Features

? Voltage controlled current source (VCCS)

pump cell driver with selectable voltage clamp,

offset compensation, diagnostic (short to

battery) and 2 output channels

? Impedance measurement of reference cell

? 10-bit multiplexed A/D converter

? Scaling amplifier with sample & hold and offset

compensation

? Control voltage amplifier with sample & hold

and offset compensation

? Synchronous or asynchronous functionality

selectable via SPI

? Heater FET driver with diagnostic (short to

battery, short to ground, open circuit)

? 4 possible levels for clean current

? SPI with fault detection

? Digital input and outputs compatible with 5 V or

3.3 V voltage supply

? 2 channels available to connect compensation

networks

? Short to battery diagnostic on functional ground

(pin SR)

? Short to battery/ground diagnostic on voltage

from reference cell (pin INRC)

? -5 V internal supply

? 4 MHz internal oscillator

? Package: 48 pin LQFP

? Technology: BCD5s_70 V

Description

L9780 is an IC designed to interface a variety of wide range air fuel sensors.

The device manages the oxygen pump of the wide range air fuel sensor by means of a voltage controlled current source (VCCS). The reference for the VCCS is generated by a PI controller with external compensation network in order to adapt the device to different sensors. The user can choose between two different networks using the SPI interface. L9780 is fully compatible with most sensors on the market.

The internal timing state machine automatically manages all the operations needed for a right sequencing of the measurement process. All the main time values can be configured by SPI.

L9780 drives also an external FET used to control the sensor heater. The device protects the sensor and all the I/O against shorts and provides the diagnosis by SPI.

L9780TR屬于集成電路（IC） > 電源管理 - 專用。意法半導(dǎo)體（ST）集團(tuán)制造生產(chǎn)的L9780TR電源管理 - 專用專用型電源管理集成電路 (PMIC) 用于電源的控制或操作，適合特定或小范圍的目標(biāo)應(yīng)用，例如汽車(chē)氣囊管理、電容器組平衡、AC 公共電力監(jiān)控、存儲(chǔ)器總線端接、接地故障檢測(cè)、能量收集、小型引擎管理、處理器或芯片集專用電壓調(diào)節(jié)、負(fù)載突降保護(hù)、觸覺(jué)驅(qū)動(dòng)器、熱電制冷器控制等。